Roger Tooth

As part of our Students Express series, we asked you to share your end of year artwork with us. The Guardian’s picture editor Roger Tooth selects some of his favourite contributions submitted before 26 May

The onslaught in Gaza and the MH17 crash scene in Ukraine have generated thousands of images, many of which show the gruesome reality of the violence. How does Roger Tooth, the Guardian's head of photography, decide whether or not to use such images?

• Warning: this article includes graphic images some readers may find disturbing

The US secretary of state, John Kerry, arrived at London’s Stansted airport
this morning on an 11th-hour mission to head off a possible Russian
annexation of Crimea on the heels of a breakaway vote by the Ukrainian
region. Top of his agenda is a meeting with the Russian foreign minister, Sergey Lavrov